Question: What is the density of aluminium at a temperature of 20 degrees?
Paraphrase: The density of aluminium becomes what at a temperature of 20 degrees?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q663 p:P2054 ?s . ?s ps:P2054 ?obj . ?s pq:P2076 ?x filter(contains(?x , '20.0')) }